Yuma and Yuuhou possess a unique ability known as the "Couple." When they engage in intimate physical contact, they receive visions of impending disasters in the near future. Yuma's expertise lies in predicting how to prevent a catastrophic ending, while Yuuhou has the ability to alter the future using Yuma's visions. In order to avoid devastating events, they must maintain extremely close contact. Kudan-sama, a mysterious figure who may have created the Couple's power, and Yuma's well-endowed mother, both urge them to do so. However, Yuma and Yuuhou are actually cousins who are uncomfortable with such intimate interactions, especially ones that cross boundaries.
